US20200123443A1 - Liquid crystal composition and liquid crystal display device - Google Patents
Liquid crystal composition and liquid crystal display device Download PDFInfo
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- US20200123443A1 US20200123443A1 US16/325,240 US201716325240A US2020123443A1 US 20200123443 A1 US20200123443 A1 US 20200123443A1 US 201716325240 A US201716325240 A US 201716325240A US 2020123443 A1 US2020123443 A1 US 2020123443A1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K19/126—Compounds containing at least one asymmetric carbon atom
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
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- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Definitions
- the present invention relates to a liquid crystal composition, in particular to a liquid crystal composition having appropriately high optical anisotropy, higher dielectric anisotropy, lower threshold voltage, suitable temperature range of nematic phase, good reliability and heat stability, and good low-temperature intersolubility.
- the present invention also relates to the use of the liquid crystal composition in the liquid crystal display device.
- Liquid crystal material is a mixture of organic rod-shaped small molecular compounds which has both liquid fluidity and anisotropy of crystal at a certain temperature. Because of its characteristics of optical anisotropy and dielectric anisotropy, liquid crystal material is widely used in the liquid crystal display elements of the devices of electronic calculators, car dashboard, televisions, computers and the like.
- the liquid crystal material can be classified into room-temperature liquid crystal (phase-transition temperature range: ⁇ 10° C. ⁇ 60° C.) and wide-temperature liquid crystal (phase-transition temperature range: ⁇ 20° C. ⁇ 70° C.), and liquid crystal displays manufactured by liquid crystal materials of different phase-transition temperatures have different application locations.
- room-temperature liquid crystal phase-transition temperature range: ⁇ 10° C. ⁇ 60° C.
- wide-temperature liquid crystal phase-transition temperature range: ⁇ 20° C. ⁇ 70° C.
- the liquid crystal display elements based on the displaying mode of the liquid crystal, it can be classified into the types of PC (phase change), TN (twist nematic), STN (super twisted nematic), ECB (electrically controlled birefringence), OCB (optically compensated bend), IPS (in-plane switching), VA (vertical alignment) and the like.
- the liquid crystal display element is classified into a reflection type utilizing natural light, a transmission type utilizing backlight, and a semi-transmission type utilizing both natural light and backlight.
- liquid crystal compounds and liquid crystal media having characteristics, such as good chemical and thermal stabilities, good stabilities against electric field and electromagnetic radiation, and appropriate optical anisotropy, meet the current requirements. Since the liquid crystal material is normally used as a mixture of various components, it is especially important that these components are miscible with each other. According to different battery types and application fields, liquid crystals must meet different requirements, such as response speed, dielectric anisotropy and optical anisotropy and the like. For example, the threshold voltage of the liquid crystal can be reduced and the electric power can be further reduced if the liquid crystal composition has low viscosity.
- the present invention focus on preparing liquid crystal composition with appropriately high optical anisotropy, lower threshold voltage, suitable temperature range of nematic phase, higher dielectric anisotropy, good reliability and heat stability, and good low-temperature intersolubility, solving the limitations in the prior art, and expanding the application fields of the liquid crystal composition under the premise of satisfying various indexes of the liquid crystal material.
- the object of the present invention is to provide a liquid crystal composition, which has higher dielectric anisotropy, good reliability and heat stability, and good low-temperature intersolubility on the basis of satisfying appropriately high optical anisotropy, lower threshold voltage, suitable elastic constant and suitable temperature range of nematic phase.
- the liquid crystal display including the liquid crystal composition has performances such as good reliability and low-temperature storage performance, can still be well displayed in a harsh environment, and has a characteristic of low driving voltage.
- R 1 represents C 1-5 alkyl or alkoxy, or C 2-5 alkenyl or alkenoxy
- Y 1 and Y 2 are same or different, and each independently represents H, F, or methyl or methoxyl which is with or without halogen substituent;
- X 1 represents F, Cl, or C 1-5 alkyl or alkoxy which is with or without halogen substituent.
- the three or more compounds of general formula I comprise 15-30% by weight of the total amount of the liquid crystal composition.
- the three or more compounds of general formula I comprise at least two compounds of general formula I-1,
- R 1 , Y 1 , Y 2 and X 1 are as defined in general formula I;
- the total amount of the at least two compounds of general formula I-1 comprise no lower than 10% by weight of the total amount of the liquid crystal composition, and wherein the content of each of the compounds of general formula I-1 is no higher than 8%.
- the structure and content of the compound of general formula I-1 are adjusted such that the liquid crystal composition including such a liquid crystal compound has good low-temperature storage stability.
- R 1 represents C 1-5 alkyl
- Y 1 , Y 2 and Y 3 are same or different, and each independently is H or F
- X 1 represents F, CF 3 or OCF 3 .
- the compound of general formula I-1 is selected from a group consisting of the following compounds:
- the three or more compounds of general formula I optionally further comprise:
- R 1A represents C 1-5 alkyl or alkoxy, or C 2-5 alkenyl or alkenoxy
- Y 1A and Y 2A are same or different, and each independently represents H, F, or methyl or methoxyl which is with or without halogen substituent;
- Y 3A represents H or F
- Y 3A represents H
- X 1A represents F, Cl, or C 1-5 alkyl or alkoxy which is with or without halogen substituent.
- the R 1A represents C 1-5 alkyl, Y 1A , Y 2A and Y 3A are same or different, and each independently is H or F; X 1A represents F, CF 3 or OCF 3 .
- the compound of general formula I-2 is preferably selected from a group consisting of the following compounds:
- the compound of general formula I-2 is particularly preferably selected from a group consisting of the following compounds:
- the liquid crystal composition further comprises:
- R 2 and R 3 are same or different, and each independently represents C 1-5 alkyl or alkoxy, or C 2-5 alkenyl or alkenoxy.
- the R 2 represents C 1-5 alkyl
- the R 3 represents C 1-5 alkyl, or C 2-3 alkenyl.
- the compound of general formula II preferably comprises 10-48% by weight of the total amount of the liquid crystal composition.
- the compound of general formula II is preferably selected from a group consisting of the following compounds:
- the compound of general formula II is particularly preferably selected from the following compounds:
- the liquid crystal composition further comprises:
- R 4 , R 5 and R 6 are same or different, and each independently represents C 1-5 alkyl or alkoxy, or C 2-5 alkenyl or alkenoxy;
- Y 4 , Y 5 , Y 6 , Y 7 , Y 8 , Y 9 and Y 10 are same or different, and each independently is H, F, or methyl or methoxyl which is with or without halogen substituent;
- X 2 represents F, Cl, or C 1-5 alkyl or alkoxy which is with or without halogen substituent.
- R 4 , R 5 and R 6 are same or different, and each independently represents C 1-5 alkyl; the Y 4 , Y 5 , Y 6 , Y 7 , Y 8 , Y 9 and Y 10 are same or different, and each independently is H or F; the X 2 represents F or CF 3 .
- the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof preferably comprise 0-35% by weight of the total amount of the liquid crystal composition.
- the compound of general formula III-1 is preferably selected from a group consisting of the following compounds:
- the compound of general formula III-2 is preferably selected from a group consisting of the following compounds:
- the compound of general formula III-2 is particularly preferably selected from the following compounds:
- the compound of general formula III-3 is preferably selected from a group consisting of the following compounds:
- the compound of general formula III-3 is particularly preferably selected from the following compounds:
- the liquid crystal composition further comprises:
- R 7 represents C 1-5 alkyl
- Y 11 and Y 12 are same or different, and each independently represents F, Cl, or C 1-5 alkyl or alkoxy which is with or without halogen substituent;
- X 3 represents F, Cl, or C 1-5 alkyl or alkoxy which is with or without halogen substituent.
- the Y 11 and Y 12 represent F;
- the X 3 represents F.
- the compound of general formula IV is preferably selected from a group consisting of the following compounds:
- the compound of genera; formula IV is particularly preferably selected from the following compounds:
- the liquid crystal composition further comprises:
- R 8 and R 9 are same or different, and each independently represents C 1-5 alkyl or alkoxy, or C 2-5 alkenyl or alkenoxy.
- the R 8 and R 9 are same or different, and each independently represents C 1-5 alkyl or alkoxy, or C 2-3 alkenyl.
- R 8 represents —C 3 H 7
- R 9 represents C 1-3 alkoxy
- R 8 represents C 3-5 alkyl
- R 9 represents C 1-3 alkyl
- R 8 represents —C 3 H 7 or CH 2 ⁇ CHC 2 H 4 —
- R 9 represents C 1-3 alkyl
- R 8 represents —C 3 H 7
- R 9 represents C 1-3 alkyl or alkoxy
- R 8 represents C 2-4 alkyl.
- R 8 represents C 3-5 alkyl
- R 9 represents —C 3 H 7 .
- R 8 represents C 3-5 alkyl
- R 9 represents —C 3 H 7 .
- R 8 represents C 2-3 alkyl
- R 9 represents C 2-4 alkyl
- the compound of general formula I comprises 15-30% by weight of the total amount of the liquid crystal composition; the compound of general formula II comprises 15-48% by weight of the total amount of the liquid crystal composition; the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 0-33% by weight of the total amount of the liquid crystal composition; the compound of general formula IV comprises 0-30% by weight of the total amount of the liquid crystal composition; and the compounds of general formulas V-1 to V-8 comprise 0-40% by weight of the total amount of the liquid crystal composition.
- the compound of general formula I comprises 20-30% by weight of the total amount of the liquid crystal composition
- the compound of general formula II comprises 20-48% by weight of the total amount of the liquid crystal composition
- the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 5-33% by weight of the total amount of the liquid crystal composition
- the compound of general formula IV comprises 5-30% by weight of the total amount of the liquid crystal composition
- the compounds of general formulas V-1 to V-8 comprise 4-40% by weight of the total amount of the liquid crystal composition.
- the compound of general formula I comprises 20-30% by weight of the total amount of the liquid crystal composition; the compound of general formula II comprises 25-48% by weight of the total amount of the liquid crystal composition; the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 10-33% by weight of the total amount of the liquid crystal composition; the compound of general formula IV comprises 5-28% by weight of the total amount of the liquid crystal composition; and the compounds of general formulas V-1 to V-8 comprise 4-40% by weight of the total amount of the liquid crystal composition.
- the compound of general formula I comprises 20-30% by weight of the total amount of the liquid crystal composition; the compound of general formula II comprises 25-48% by weight of the total amount of the liquid crystal composition; the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 15-33% by weight of the total amount of the liquid crystal composition; the compound of general formula IV comprises 5-20% by weight of the total amount of the liquid crystal composition; and the compounds of general formulas V-1 to V-8 comprise 4-31% by weight of the total amount of the liquid crystal composition.
- the present invention provides a liquid crystal composition, which further comprises one or more additives known to those skilled in the art and described in the literatures. For example, 0-15% of polychromatic dye and/or chiral dopant can be added.
- Dopants which can be preferably added to the mixture according to the present invention are shown below.
- the dopant comprises 0-5% by weight of the total amount of the liquid crystal composition; more preferably, the dopant comprises 0-1% by weight of the total amount of the liquid crystal composition.
- Stabilizers which can be added, for example, to the mixture according to the invention are mentioned below.
- the stabilizer is selected from a group consisting of stabilizers as shown below.
- the stabilizer comprises 0-5% by weight of the total amount of the liquid crystal composition; more preferably, the stabilizer comprises 0-1% by weight of the total amount of the liquid crystal composition; as a particularly preferred embodiment, the stabilizer comprises 0-0.1% by weight of the total amount of the liquid crystal composition.
- the present invention provides a liquid crystal display device comprising the liquid crystal composition of the present invention.
- the present invention determines that a liquid crystal medium comprising the above liquid crystal composition has appropriately high optical anisotropy, higher optical anisotropy, lower threshold voltage, suitably large elastic constant, suitable temperature range of nematic phase, good reliability and heat stability, and good low-temperature intersolubility, and is applicable to liquid crystal displays.
- the liquid crystal display including the liquid crystal composition has performances such as good high reliability and low-temperature storage performance, can still be well displayed in a harsh environment, and has low driving voltage characteristics.
- the ratio is weight ratio
- the temperature is in degree Celsius
- the cell gap selected for the test for response time data is 7 ⁇ m.
- nCPUF represents the number of the carbon atoms of the alkyl group on the left, for example, n is “3”, meaning that the alkyl is —C 3 H 7 ; the C in the code represents “cyclohexyl”.
- the optical anisotropy is tested and obtained by using abbe refractometer under sodium lamp (589 nm) light source at 20° C.; the dielectric test cell is the TN90 type with a cell gap is 7 ⁇ m.
- ⁇ ⁇
- ⁇ 1 is tested and obtained by the TOY06254 type liquid crystal physical property evaluation system; the test temperature is 25° C., and the test voltage is 90 V.
- VHR (initial) is tested and obtained by the TOY06254 type liquid crystal physical property evaluation system; the test temperature is 60° C., the test voltage is 5 V, and the test frequency is 6 Hz.
- VHR high temperature
- the liquid crystal is tested after being held at a high temperature of 150° C. for 1 h, the test temperature is 60° C., the test voltage is 5 V, and the test frequency is 6 Hz.
- Example 1 The liquid crystal composition of Example 1 is prepared according to each compound and weight percentage listed in Table 2, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 2 The liquid crystal composition of Example 2 is prepared according to each compound and weight percentage listed in Table 3, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 3 The liquid crystal composition of Example 3 is prepared according to each compound and weight percentage listed in Table 4, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 4 The liquid crystal composition of Example 4 is prepared according to each compound and weight percentage listed in Table 5, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 5 The liquid crystal composition of Example 5 is prepared according to each compound and weight percentage listed in Table 6, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 6 The liquid crystal composition of Example 6 is prepared according to each compound and weight percentage listed in Table 7, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 7 The liquid crystal composition of Example 7 is prepared according to each compound and weight percentage listed in Table 8, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 8 The liquid crystal composition of Example 8 is prepared according to each compound and weight percentage listed in Table 9, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 9 The liquid crystal composition of Example 9 is prepared according to each compound and weight percentage listed in Table 10, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 10 The liquid crystal composition of Example 10 is prepared according to each compound and weight percentage listed in Table 11, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 11 The liquid crystal composition of Example 11 is prepared according to each compound and weight percentage listed in Table 12, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 12 The liquid crystal composition of Example 12 is prepared according to each compound and weight percentage listed in Table 13, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 13 The liquid crystal composition of Example 13 is prepared according to each compound and weight percentage listed in Table 14, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 14 The liquid crystal composition of Example 14 is prepared according to each compound and weight percentage listed in Table 15, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 15 The liquid crystal composition of Example 15 is prepared according to each compound and weight percentage listed in Table 16, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 16 The liquid crystal composition of Example 16 is prepared according to each compound and weight percentage listed in Table 17, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 17 The liquid crystal composition of Example 17 is prepared according to each compound and weight percentage listed in Table 18, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- Example 18 The liquid crystal composition of Example 18 is prepared according to each compound and weight percentage listed in Table 19, and then tested by filling the same between two substrates of a liquid crystal display device.
- the test data is shown in the Table below:
- liquid crystal composition provided by the present invention has appropriately high optical anisotropy, higher optical anisotropy, lower threshold voltage, suitable temperature range of nematic phase, suitable elastic constant, lower viscosity, good reliability and heat stability, and good low-temperature intersolubility, and is applicable to IPS, TN-TFT liquid crystal displays.
Abstract
Description
- The present invention relates to a liquid crystal composition, in particular to a liquid crystal composition having appropriately high optical anisotropy, higher dielectric anisotropy, lower threshold voltage, suitable temperature range of nematic phase, good reliability and heat stability, and good low-temperature intersolubility. The present invention also relates to the use of the liquid crystal composition in the liquid crystal display device.
- Liquid crystal material is a mixture of organic rod-shaped small molecular compounds which has both liquid fluidity and anisotropy of crystal at a certain temperature. Because of its characteristics of optical anisotropy and dielectric anisotropy, liquid crystal material is widely used in the liquid crystal display elements of the devices of electronic calculators, car dashboard, televisions, computers and the like.
- Based on the phase-transition temperature, the liquid crystal material can be classified into room-temperature liquid crystal (phase-transition temperature range: −10° C.˜60° C.) and wide-temperature liquid crystal (phase-transition temperature range: −20° C.˜70° C.), and liquid crystal displays manufactured by liquid crystal materials of different phase-transition temperatures have different application locations. As the application range of liquid crystal display devices continues to expand, people have put forward higher requirements on the operating temperature range of the device to adapt to various harsh usage environments. In order to expand the working range of liquid crystal displays, it is needed for liquid crystal display materials to have a wide temperature range of nematic phase so as to meet the requirements for maintaining good display in various environments.
- For the liquid crystal display elements, based on the displaying mode of the liquid crystal, it can be classified into the types of PC (phase change), TN (twist nematic), STN (super twisted nematic), ECB (electrically controlled birefringence), OCB (optically compensated bend), IPS (in-plane switching), VA (vertical alignment) and the like. Based on the type of the light source, the liquid crystal display element is classified into a reflection type utilizing natural light, a transmission type utilizing backlight, and a semi-transmission type utilizing both natural light and backlight.
- For liquid crystal displays, liquid crystal compounds and liquid crystal media having characteristics, such as good chemical and thermal stabilities, good stabilities against electric field and electromagnetic radiation, and appropriate optical anisotropy, meet the current requirements. Since the liquid crystal material is normally used as a mixture of various components, it is especially important that these components are miscible with each other. According to different battery types and application fields, liquid crystals must meet different requirements, such as response speed, dielectric anisotropy and optical anisotropy and the like. For example, the threshold voltage of the liquid crystal can be reduced and the electric power can be further reduced if the liquid crystal composition has low viscosity.
- However, a disadvantage that is significantly present in the prior art (e.g., EP0673986, DE19528106, DE19528107, etc.) is lower resistivity and excessive operating voltage, etc. Additionally, poorer low-temperature storage stability is also a defect of many existing liquid crystal materials, such as WO9732942A1.
- When there are issues such as smaller dielectric anisotropy, poorer reliability and the low-temperature stability in the prior art, the present invention focus on preparing liquid crystal composition with appropriately high optical anisotropy, lower threshold voltage, suitable temperature range of nematic phase, higher dielectric anisotropy, good reliability and heat stability, and good low-temperature intersolubility, solving the limitations in the prior art, and expanding the application fields of the liquid crystal composition under the premise of satisfying various indexes of the liquid crystal material.
- The object of the present invention is to provide a liquid crystal composition, which has higher dielectric anisotropy, good reliability and heat stability, and good low-temperature intersolubility on the basis of satisfying appropriately high optical anisotropy, lower threshold voltage, suitable elastic constant and suitable temperature range of nematic phase. The liquid crystal display including the liquid crystal composition has performances such as good reliability and low-temperature storage performance, can still be well displayed in a harsh environment, and has a characteristic of low driving voltage.
- The technical solution employed by the present invention is to provide a liquid crystal composition comprising:
- three or more compounds of general formula I
- in which,
- R1 represents C1-5 alkyl or alkoxy, or C2-5 alkenyl or alkenoxy;
- Y1 and Y2 are same or different, and each independently represents H, F, or methyl or methoxyl which is with or without halogen substituent;
- is selected from a group consisting of
- is selected from a group consisting of
- X1 represents F, Cl, or C1-5 alkyl or alkoxy which is with or without halogen substituent.
- In an embodiment of the present invention, the three or more compounds of general formula I comprise 15-30% by weight of the total amount of the liquid crystal composition.
- In an embodiment of the present invention, the three or more compounds of general formula I comprise at least two compounds of general formula I-1,
- R1, Y1, Y2 and X1 are as defined in general formula I;
- wherein the total amount of the at least two compounds of general formula I-1 comprise no lower than 10% by weight of the total amount of the liquid crystal composition, and wherein the content of each of the compounds of general formula I-1 is no higher than 8%.
- In an embodiment of the present invention, the structure and content of the compound of general formula I-1 are adjusted such that the liquid crystal composition including such a liquid crystal compound has good low-temperature storage stability.
- In an embodiment of the present invention, it is preferred that the R1 represents C1-5 alkyl, Y1, Y2 and Y3 are same or different, and each independently is H or F; X1 represents F, CF3 or OCF3.
- In some embodiments of the present invention, it is preferred that the compound of general formula I-1 is selected from a group consisting of the following compounds:
- In an embodiment of the present invention, the three or more compounds of general formula I optionally further comprise:
- 0-15% by weight of the total amount of the liquid crystal composition of one or more compounds of general formula I-2
- in which,
- R1A represents C1-5 alkyl or alkoxy, or C2-5 alkenyl or alkenoxy;
- Y1A and Y2A are same or different, and each independently represents H, F, or methyl or methoxyl which is with or without halogen substituent;
- Y3A represents H or F;
- is selected from a group consisting of
- Y3A represents H;
- X1A represents F, Cl, or C1-5 alkyl or alkoxy which is with or without halogen substituent.
- In some embodiments of the present invention, the R1A represents C1-5 alkyl, Y1A, Y2A and Y3A are same or different, and each independently is H or F; X1A represents F, CF3 or OCF3.
- In some embodiments of the present invention, the compound of general formula I-2 is preferably selected from a group consisting of the following compounds:
- The compound of general formula I-2 is particularly preferably selected from a group consisting of the following compounds:
- In an embodiment of the present invention, the liquid crystal composition further comprises:
- 10-50% by weight of the total amount of the liquid crystal composition of one or more compounds of general formula II
- in which,
- R2 and R3 are same or different, and each independently represents C1-5 alkyl or alkoxy, or C2-5 alkenyl or alkenoxy.
- In an embodiment of the present invention, it is preferred that the R2 represents C1-5 alkyl; the R3 represents C1-5 alkyl, or C2-3 alkenyl.
- In an embodiment of the present invention, the compound of general formula II preferably comprises 10-48% by weight of the total amount of the liquid crystal composition.
- In an embodiment of the present invention, the compound of general formula II is preferably selected from a group consisting of the following compounds:
- The compound of general formula II is particularly preferably selected from the following compounds:
- In an embodiment of the present invention, the liquid crystal composition further comprises:
- 0-50% by weight of the total amount of the liquid crystal composition of one or more compounds selected from a group consisting of compounds of general formula III-1, general formula III-2 and general formula III-3
- in which,
- R4, R5 and R6 are same or different, and each independently represents C1-5 alkyl or alkoxy, or C2-5 alkenyl or alkenoxy;
- Y4, Y5, Y6, Y7, Y8, Y9 and Y10 are same or different, and each independently is H, F, or methyl or methoxyl which is with or without halogen substituent;
- X2 represents F, Cl, or C1-5 alkyl or alkoxy which is with or without halogen substituent.
- In an embodiment of the present invention, it is preferred that R4, R5 and R6 are same or different, and each independently represents C1-5 alkyl; the Y4, Y5, Y6, Y7, Y8, Y9 and Y10 are same or different, and each independently is H or F; the X2 represents F or CF3.
- In an embodiment of the present invention, the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof preferably comprise 0-35% by weight of the total amount of the liquid crystal composition.
- In an embodiment of the present invention, the compound of general formula III-1 is preferably selected from a group consisting of the following compounds:
- In an embodiment of the present invention, the compound of general formula III-2 is preferably selected from a group consisting of the following compounds:
- The compound of general formula III-2 is particularly preferably selected from the following compounds:
- In an embodiment of the present invention, the compound of general formula III-3 is preferably selected from a group consisting of the following compounds:
- The compound of general formula III-3 is particularly preferably selected from the following compounds:
- In an embodiment of the present invention, the liquid crystal composition further comprises:
- 0-30% by weight of the total amount of the liquid crystal composition of one or more compounds selected from general formula IV
- in which,
- R7 represents C1-5 alkyl;
- Y11 and Y12 are same or different, and each independently represents F, Cl, or C1-5 alkyl or alkoxy which is with or without halogen substituent;
- is selected from a group consisting of
- X3 represents F, Cl, or C1-5 alkyl or alkoxy which is with or without halogen substituent.
- In an embodiment of the present invention, the Y11 and Y12 represent F; the
- is selected from a group consisting of
- the X3 represents F.
- More preferably, the
- is selected from a group consisting of
- In an embodiment of the present invention, the compound of general formula IV is preferably selected from a group consisting of the following compounds:
- The compound of genera; formula IV is particularly preferably selected from the following compounds:
- In an embodiment of the present invention, the liquid crystal composition further comprises:
- 0-40% by weight of the total amount of the liquid crystal composition of one or more compounds selected from a group consisting of compounds of formula V-1 to formula V-8
- in which,
- R8 and R9 are same or different, and each independently represents C1-5 alkyl or alkoxy, or C2-5 alkenyl or alkenoxy.
- In an embodiment of the present invention, the R8 and R9 are same or different, and each independently represents C1-5 alkyl or alkoxy, or C2-3 alkenyl.
- In formula V-1, it is particularly preferred that the R8 represents —C3H7, and the R9 represents C1-3 alkoxy.
- In formula V-2, it is particularly preferred that the R8 represents C3-5 alkyl, and the R9 represents C1-3 alkyl.
- In formula V-3, it is particularly preferred that the R8 represents —C3H7 or CH2═CHC2H4—, and the R9 represents C1-3 alkyl.
- In formula V-4, it is particularly preferred that the R8 represents —C3H7, and the R9 represents C1-3 alkyl or alkoxy.
- In formula V-5, it is particularly preferred that the R8 represents C2-4 alkyl.
- In formula V-6, it is particularly preferred that the R8 represents C3-5 alkyl, and the R9 represents —C3H7.
- In formula V-7, it is particularly preferred that the R8 represents C3-5 alkyl, and the R9 represents —C3H7.
- In formula V-8, it is particularly preferred that the R8 represents C2-3 alkyl, and the R9 represents C2-4 alkyl.
- In an embodiment of the present invention, the compound of general formula I comprises 15-30% by weight of the total amount of the liquid crystal composition; the compound of general formula II comprises 15-48% by weight of the total amount of the liquid crystal composition; the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 0-33% by weight of the total amount of the liquid crystal composition; the compound of general formula IV comprises 0-30% by weight of the total amount of the liquid crystal composition; and the compounds of general formulas V-1 to V-8 comprise 0-40% by weight of the total amount of the liquid crystal composition.
- In an embodiment of the present invention, preferably, the compound of general formula I comprises 20-30% by weight of the total amount of the liquid crystal composition; the compound of general formula II comprises 20-48% by weight of the total amount of the liquid crystal composition; the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 5-33% by weight of the total amount of the liquid crystal composition; the compound of general formula IV comprises 5-30% by weight of the total amount of the liquid crystal composition; and the compounds of general formulas V-1 to V-8 comprise 4-40% by weight of the total amount of the liquid crystal composition.
- More preferably, the compound of general formula I comprises 20-30% by weight of the total amount of the liquid crystal composition; the compound of general formula II comprises 25-48% by weight of the total amount of the liquid crystal composition; the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 10-33% by weight of the total amount of the liquid crystal composition; the compound of general formula IV comprises 5-28% by weight of the total amount of the liquid crystal composition; and the compounds of general formulas V-1 to V-8 comprise 4-40% by weight of the total amount of the liquid crystal composition.
- As a particularly preferred solution, the compound of general formula I comprises 20-30% by weight of the total amount of the liquid crystal composition; the compound of general formula II comprises 25-48% by weight of the total amount of the liquid crystal composition; the compounds of the group consisting of general formulas III-1, III-2, III-3 and the combination thereof comprise 15-33% by weight of the total amount of the liquid crystal composition; the compound of general formula IV comprises 5-20% by weight of the total amount of the liquid crystal composition; and the compounds of general formulas V-1 to V-8 comprise 4-31% by weight of the total amount of the liquid crystal composition.
- In another aspect, the present invention provides a liquid crystal composition, which further comprises one or more additives known to those skilled in the art and described in the literatures. For example, 0-15% of polychromatic dye and/or chiral dopant can be added.
- Dopants which can be preferably added to the mixture according to the present invention are shown below.
- In an embodiment of the present invention, preferably, the dopant comprises 0-5% by weight of the total amount of the liquid crystal composition; more preferably, the dopant comprises 0-1% by weight of the total amount of the liquid crystal composition.
- Stabilizers which can be added, for example, to the mixture according to the invention are mentioned below.
- Preferably, the stabilizer is selected from a group consisting of stabilizers as shown below.
- In an embodiment of the present invention, preferably, the stabilizer comprises 0-5% by weight of the total amount of the liquid crystal composition; more preferably, the stabilizer comprises 0-1% by weight of the total amount of the liquid crystal composition; as a particularly preferred embodiment, the stabilizer comprises 0-0.1% by weight of the total amount of the liquid crystal composition.
- In still another aspect, the present invention provides a liquid crystal display device comprising the liquid crystal composition of the present invention.
- Through performing combination experiments on the above compounds, the present invention determines that a liquid crystal medium comprising the above liquid crystal composition has appropriately high optical anisotropy, higher optical anisotropy, lower threshold voltage, suitably large elastic constant, suitable temperature range of nematic phase, good reliability and heat stability, and good low-temperature intersolubility, and is applicable to liquid crystal displays. The liquid crystal display including the liquid crystal composition has performances such as good high reliability and low-temperature storage performance, can still be well displayed in a harsh environment, and has low driving voltage characteristics.
- Unless specifically indicated, in the present invention, the ratio is weight ratio, the temperature is in degree Celsius, and the cell gap selected for the test for response time data is 7 μm.
- The present invention will be illustrated by combining the detailed embodiments below. It should be noted that, the following examples are exemplary embodiments of the present invention, which are only used to illustrate the present invention, not to limit it. Other combinations and various modifications within the conception of the present invention are possible without departing from the subject matter and scope of the present invention.
- For the convenience of the expression, the group structures of the liquid crystal compounds in the following Examples are represented by the codes listed in Table 1:
-
TABLE 1 Codes of the group structures of the liquid crystal compounds Unit structure of the group Code Name of the group C 1,4-cyclohexylidene P 1,4-phenylene G 2-fluoro-1,4-phenylene U 2,5-difluoro-1,4-phenylene A oxanyl D dioxanyl I indan-2,5-diyl —F F fluorine substituent —CH═CH— V alkenyl —CF2O— Q difluoro ether group —CF3 CF3 trifluoromethyl —OCF3 OCF3 trifluoromethoxy —CnH2n+1 or —CmH2m+1 n or m alkyl - Take the following structural formula as an example:
- Represented by the codes listed in Table 2, this structural formula can be expressed as nCPUF, in which, the n in the code represents the number of the carbon atoms of the alkyl group on the left, for example, n is “3”, meaning that the alkyl is —C3H7; the C in the code represents “cyclohexyl”.
- The abbreviated codes of the test items in the following Examples are as follows:
-
- Cp (° C.) clearing point (nematic-isotropy phase transition temperature)
- Δn: optical anisotropy (589 nm, 25° C.)
- Δε: dielectric constant anisotropy (1 KHz, 25° C.)
- γ1: rotational viscosity (mPa*s, at 25° C.)
- K11: elastic constant (“splay”, the pN at 25° C.)
- K33: elastic constant (“blend”, the pN at 25° C.)
- LTS (bottle at −25° C.): low-temperature storage time (at −25° C.)
- LTS (bottle at −30° C.): low-temperature storage time (at −30° C.)
- VHR (initial): voltage holding ratio (%)
- VHR (high temperature): voltage holding ratio after holding at high temperature of 150° C. for 1 h (%)
- In which, the optical anisotropy is tested and obtained by using abbe refractometer under sodium lamp (589 nm) light source at 20° C.; the dielectric test cell is the TN90 type with a cell gap is 7 μm.
- Δε=ε|−ε⊥, in which, ε| all is a dielectric constant parallel to the molecular axis, ε⊥ is a dielectric constant perpendicular to the molecular axis, with the test conditions: 25° C., 1 KHz, TN90 type test cell with a cell gap of 7 μm.
- γ1 is tested and obtained by the TOY06254 type liquid crystal physical property evaluation system; the test temperature is 25° C., and the test voltage is 90 V.
- VHR (initial) is tested and obtained by the TOY06254 type liquid crystal physical property evaluation system; the test temperature is 60° C., the test voltage is 5 V, and the test frequency is 6 Hz.
- VHR (high temperature) is tested and obtained by the TOY06254 type liquid crystal physical property evaluation system; the liquid crystal is tested after being held at a high temperature of 150° C. for 1 h, the test temperature is 60° C., the test voltage is 5 V, and the test frequency is 6 Hz.
- The liquid crystal composition of Example 1 is prepared according to each compound and weight percentage listed in Table 2, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 2 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2IUQUF IV-1 6 Δn 0.109 3IUQUF IV-2 8 Δ∈ 12.6 3PGUQUF I-1-2 6 Cp 78.7 4PGUQUF I-1-3 6 γ1 81 5PGUQUF I-1-4 6 K11 12.7 2PGUQPOCF3 I-1-8 5 K33 14.3 3PGUQPOCF3 I-1-9 3 LTS (bottle >1500 h at −25° C.) 2CCGF III-1-1 2 LTS (bottle >1500 h at −30° C.) 3CCGF III-1-2 8 VHR (initial) 97.5 4CCGF III-1-3 3 VHR (high 97.1 temperature) 5CCGF III-1-4 5 3CCPOCF3 III-1-10 9 3CCV II-6 33 Total 100 - The liquid crystal composition of Example 2 is prepared according to each compound and weight percentage listed in Table 3, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 3 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2IUQUF IV-1 8 Δn 0.107 3IUQUF IV-2 8 Δ∈ 12.7 3PGUQUF I-1-2 5 Cp 80.2 4PGUQUF I-1-3 5 γ1 84 5PGUQUF I-1-4 5 K11 12.2 2PGUQPOCF3 I-1-8 3 K33 14.3 3PGUQPOCF3 I-1-9 4 LTS (bottle >1000 h at −25° C.) 3CCGF III-1-2 10 LTS (bottle >1000 h at −30° C.) 4CCGF III-1-3 8 VHR (initial) 97.2 3CCPOCF3 III-1-10 15 VHR (high 96.9 temperature) 3CCV II-6 29 Total 100 - The liquid crystal composition of Example 3 is prepared according to each compound and weight percentage listed in Table 4, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 4 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2IUQUF IV-1 6.5 Δn 0.108 3IUQUF IV-2 8 Δ∈ 12.8 3PGUQUF I-1-2 6 Cp 80.8 4PGUQUF I-1-3 6 γ1 90 5PGUQUF I-1-4 6 K11 12.6 2PGUQPOCF3 I-1-8 5 K33 14.1 3PGUQPOCF3 I-1-9 2.5 LTS (bottle >1000 h at −25° C.) 2CCGF III-1-1 4.5 LTS (bottle >1000 h at −30° C.) 3CCGF III-1-2 7 VHR (initial) 97.7 4CCGF III-1-3 5 VHR (high 97.6 temperature) 3CCPOCF3 III-1-10 10 3CPPC3 V-6 1.5 3CCV II-6 22 3CC2 II-2 10 Total 100 - The liquid crystal composition of Example 4 is prepared according to each compound and weight percentage listed in Table 5, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 5 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQUF I-1-1 3 Δn 0.112 3PGUQUF I-1-2 4 Δε 13.5 4PGUQUF I-1-3 3 Cp 75 3APUQUF I-2-7 5 γ1 87 2PUQUF IV-10 8 K11 13.5 3PUQUF IV-11 14 K33 15.2 3IUQUF IV-2 6 LTS (bottle >1000 h at −25° C.) 2CCUF III-1-5 4 LTS (bottle >1000 h at −30° C.) 3CCUF III-1-6 8 VHR (initial) 97.2 3CCPUF III-3-2 4 VHR (high 96.7 temperature) 4CCPUF III-3-3 4 3CCP1 V-3 4 3CCV II-6 28 3CGPC3 V-7 5 Total 100 - The liquid crystal composition of Example 5 is prepared according to each compound and weight percentage listed in Table 6, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 6 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQPOCF3 I-1-8 3 Δn 0.11 3PGUQPOCF3 I-1-9 4 Δε 12.1 4PGUQPOCF3 I-1-10 4 Cp 78.9 3DPUQUF I-2-12 5 γ1 82 2IUQUF IV-1 8 K11 13.7 3IUQUF IV-2 8 K33 15.3 3DUQUF IV-7 4 LTS (bottle >1000 h at −25° C.) 3AUQUF IV-4 4 LTS (bottle >1000 h at −30° C.) 3CCUF III-1-6 6 VHR (initial) 97.1 3CCPUF III-3-2 6 VHR (high 96.5 temperature) 3CPUF III-2-5 6 3CCP3 V-3 9 3CCV II-6 30 3CPPC3 V-6 3 Total 100 - The liquid crystal composition of Example 6 is prepared according to each compound and weight percentage listed in Table 7, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 7 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQUF I-1-1 5 Δn 0.11 3PGUQUF I-1-2 5 Δε 12.3 4PGUQUF I-1-3 5 Cp 73 2PUQUF IV-10 10 γ1 85 3PUQUF IV-11 16 K11 12.9 3CCGF III-1-2 6 K33 14.8 4CCGF III-1-3 4 LTS (bottle >1000 h at −25° C.) 3CCPOCF3 III-1-10 8 LTS (bottle >1000 h at −30° C.) 3CPP2 V-4 6 VHR (initial) 97.4 3CCV II-6 25 VHR (high 97.0 temperature) 3CPO2 V-1 6 5CPPC3 V-6 4 Total 100 - The liquid crystal composition of Example 7 is prepared according to each compound and weight percentage listed in Table 8, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 8 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQPCF3 I-1-5 4 Δn 0.109 3PGUQPCF3 I-1-6 4 Δε 11 4PGUQPCF3 I-1-7 4 Cp 72.1 3CGUQUF I-2-5 3 γ1 79 3CPUQUF I-2-2 3 K11 13.2 3PUQUF IV-11 8 K33 14.4 2IUQUF IV-1 6 LTS (bottle >1000 h at −25° C.) 3IUQUF IV-2 8 LTS (bottle >1000 h at −30° C.) 3CCUF III-1-6 6 VHR (initial) 97.6 5CCUF III-1-8 5 VHR (high 97.0 temperature) 3CCV II-6 28 3CCV1 II-7 5 3PP2 V-2 5 3CPPC3 V-6 3 3PGPF V-5 4 2PGPC4 V-8 4 Total 100 - The liquid crystal composition of Example 8 is prepared according to each compound and weight percentage listed in Table 9, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 9 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQUF I-1-1 4 Δn 0.107 3PGUQUF I-1-2 4 Δε 11.8 4PGUQUF I-1-3 4 Cp 74.2 3PGUQPOCF3 I-1-9 4 γ1 77 2DPUQUF I-2-11 4 K11 13.1 2IUQUF IV-1 8 K33 14.4 3IUQUF IV-2 11 LTS (bottle >1000 h at −25° C.) 2CCPUF III-3-1 4 LTS (bottle >1000 h at −30° C.) 2CCGF III-1-1 4 VHR (initial) 97.3 3CCGF III-1-2 6 VHR (high 96.9 temperature) 4CCGF III-1-3 6 V2CCP1 V-3 4 3CCV II-6 29 5CCV II-9 6 5CGPC3 V-7 2 Total 100 - The liquid crystal composition of Example 9 is prepared according to each compound and weight percentage listed in Table 10, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 10 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQPOCF3 I-1-8 5 Δn 0.121 3PGUQPOCF3 I-1-9 5 Δε 11.2 4PGUQPOCF3 I-1-10 5 Cp 95.1 5PGUQPOCF3 I-1-11 5 γ1 99 3PPUQUF I-2-15 2 K11 14.8 2PUQUF IV-10 6 K33 16.2 3PUQUF IV-11 10 LTS (bottle >1000 h at −25° C.) 5CCGF III-1-4 6 LTS (bottle >1000 h at −30° C.) 2CCPOCF3 III-1-9 9 VHR (initial) 97.4 3CCPOCF3 III-1-10 10 VHR (high 96.8 temperature) 3CCV II-6 31 3PGPC2 V-8 3 2PGPC3 V-8 3 Total 100 - The liquid crystal composition of Example 10 is prepared according to each compound and weight percentage listed in Table 11, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 11 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQUF I-1-1 4 Δn 0.117 3PGUQUF I-1-2 4 Δε 10.3 2PGUQPOCF3 I-1-8 3 Cp 72.7 3PGUQPOCF3 I-1-9 4 γ1 73 4PGUQPOCF3 I-1-10 3 K11 14.1 2APUQUF I-2-7 3 K33 15.2 3APUQUF I-2-8 4 LTS (bottle >1000 h at −25° C.) 2PUQUF IV-10 3 LTS (bottle >1000 h at −30° C.) 3PUQUF IV-11 3 VHR (initial) 97.7 3DUQUF IV-7 3 VHR (high 97.4 temperature) 3AUQUF IV-4 3 VCCP1 V-3 12 3CCV II-6 30 3CCV1 II-7 10 5PP1 V-2 8 3PGPC4 V-8 3 Total 100 - The liquid crystal composition of Example 11 is prepared according to each compound and weight percentage listed in Table 12, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 12 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQPOCF3 I-1-8 6 Δn 0.125 3PGUQPOCF3 I-1-9 8 Δε 9.5 4PGUQPOCF3 I-1-10 8 Cp 100.3 3CPUQUF I-2-2 5 γ1 88 3PUQUF IV-11 10 K11 13.3 3CPPO1 V-4 5 K33 14.2 3CCP3 V-3 8 LTS (bottle >1000 h at −25° C.) 3CCV II-6 23 LTS (bottle >1000 h at −30° C.) 3CPO1 V-1 8 VHR (initial) 97.8 3CPO2 V-1 7 VHR (high 97.3 temperature) 3CPPC3 V-6 3 3CPPC5 V-6 3 2PGPF V-5 2 3PGPF V-5 2 4PGPF V-5 2 Total 100 - The liquid crystal composition of Example 12 is prepared according to each compound and weight percentage listed in Table 13, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 13 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 3PGUQUF I-1-2 5 Δn 0.107 4PGUQUF I-1-3 4 Δε 8.5 3PGUQPOCF3 I-1-9 4 Cp 86.4 4PGUQPOCF3 I-1-10 4 γ1 67 3PGUQPCF3 I-1-6 4 K11 12.4 4PGUQPCF3 I-1-7 4 K33 14.8 3PPUQUF I-2-15 3 LTS (bottle >1000 h at −25° C.) 3CCP1 V-3 8 LTS (bottle >1000 h at −30° C.) VCCP1 V-3 10 VHR (initial) 98.0 3CCV II-6 40 VHR (high 97.8 temperature) 3CCV1 II-7 8 5CPO2 V-1 6 Total 100 - The liquid crystal composition of Example 13 is prepared according to each compound and weight percentage listed in Table 14, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 14 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 3PGUQPOCF3 I-I-9 3 Δn 0.109 4PGUQPOCF3 I-I-10 2 Δε 11.3 2PGUQPCF3 I-I-5 2 Cp 85 3PGUQPCF3 I-I-6 3 γ1 78 2APUQUF I-2-7 4 K11 14.3 3APUQUF I-2-8 4 K33 15 3CPUQUF I-2-2 7 LTS (bottle >1000 h at −25° C.) 3IUQUF IV-2 8 LTS (bottle >1000 h at −30° C.) 3CCUF III-I-6 8 VHR (initial) 97.5 4CCUF III-I-7 7 VHR (high 97.2 temperature) 2CCPUF III-3-1 4 3CCPUF III-3-2 4 5CPGF III-2-3 3 3CCV II-6 33 3CC2 II-2 4 4PGPF V-3 2 3PGPC2 V-8 2 Total 100 - The liquid crystal composition of Example 14 is prepared according to each compound and weight percentage listed in Table 15, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
-
TABLE 15 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQPOCF3 I-1-8 3 Δn 0.096 3PGUQPOCF3 I-1-9 4 Δε 11.8 2PGUQPCF3 I-1-5 3 Cp 75.2 3PGUQPCF3 I-1-6 4 γ1 84 2DPUQUF I-2-7 5 K11 14 3DPUQUF I-2-8 5 K33 15.5 2IUQUF IV-1 6 LTS (bottle >1000 h at −25° C.) 3IUQUF IV-2 8 LTS (bottle >1000 h at −30° C.) 2CCGF III-1-1 4 VHR (initial) 97.7 3CCGF III-1-2 6 VHR (high 97.4 temperature) 4CCGF III-1-3 6 5CCGF III-1-4 5 3CCV II-6 25 4CC3 II-3 8 5CC2 II-4 8 Total 100 - The liquid crystal composition of Example 15 is prepared according to each compound and weight percentage listed in Table 16, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 16 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQUF I-1-1 5 Δn 0.116 3PGUQUF I-1-2 5 Δε 13.2 4PGUQUF I-1-3 5 Cp 82.5 2PGUQPOCF3 I-1-8 5 γ1 93 3PGUQPOCF3 I-1-9 5 K11 13.5 4PGUQPOCF3 I-1-10 5 K33 14.5 2IUQUF IV-1 6 LTS (bottle >1000 h at −25° C.) 3IUQUF IV-2 6 LTS (bottle >1000 h at −30° C.) 3CCGF III-1-2 8 VHR (initial) 97.3 4CCGF III-1-3 7 VHR (high 96.8 temperature) 2CCPOCF3 III-1-9 6 3CCPOCF3 III-1-10 7 3CCV II-6 20 3CC2 II-2 6 5CC3 II-5 4 Total 100 - The liquid crystal composition of Example 16 is prepared according to each compound and weight percentage listed in Table 17, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 17 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQUF I-1-1 6 Δn 0.114 3PGUQUF I-1-2 6 Δε 9.2 4PGUQUF I-1-3 6 Cp 71.4 3PGUQPCF3 I-1-6 3 γ1 72 4PGUQPCF3 I-1-7 3 K11 13 3IUQUF IV-2 4 K33 14.3 3CCP1 V-3 5 LTS (bottle >1000 h at −25° C.) 3CCP3 V-3 5 LTS (bottle >1000 h at −30° C.) 3CPP2 V-4 5 VHR (initial) 97.9 3CCV II-6 35 VHR (high 97.7 temperature) 5CCV II-9 6 3CPO2 V-1 8 3PP2 V-2 6 3PGPF V-5 2 Total 100 - The liquid crystal composition of Example 17 is prepared according to each compound and weight percentage listed in Table 18, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 18 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 3PGUQUF I-1-2 7 Δn 0.112 4PGUQUF I-1-3 7 Δε 12.31 2PGUQPCF3 I-1-5 6 Cp 76.9 3PGUQPCF3 I-1-6 7 γ1 85 3CPUQUF I-2-2 2 K11 14.1 3DUQUF IV-7 3 K33 15.2 3AUQUF IV-4 3 LTS (bottle >1000 h at −25° C.) 3CCPUF III-3-2 3 LTS (bottle >1000 h at −30° C.) 5CCPUF III-3-4 2 VHR (initial) 97.2 3CPUF III-2-5 11 VHR (high 97.0 temperature) 5CPUF III-2-7 5 3CCV II-6 24 3CC2 II-2 12 4CC3 II-3 8 Total 100 - The liquid crystal composition of Example 18 is prepared according to each compound and weight percentage listed in Table 19, and then tested by filling the same between two substrates of a liquid crystal display device. The test data is shown in the Table below:
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TABLE 19 Formulation of the liquid crystal composition and its test performance Code of No. of Content Test results for the component compound percentage performance parameters 2PGUQUF I-1-1 3 Δn 0.116 3PGUQUF I-1-2 3 Δε 10.4 4PGUQUF I-1-3 3 Cp 84 2PGUQPOCF3 I-1-8 6 γ1 74 3PGUQPOCF3 I-1-9 8 K11 13.8 4PGUQPOCF3 I-1-10 7 K33 14.9 3CCGF III-1-2 6 LTS (bottle >1000 h at −25° C.) 4CCGF III-1-3 6 LTS (bottle >1000 h at −30° C.) 2CCPOCF3 III-1-9 5 VHR (initial) 97.5 3CCV II-6 39 VHR (high 97.2 temperature) 4CCV II-8 6 3PGPF V-5 3 4PGPF V-5 3 5PGPF V-5 2 Total 100 - It can be seen from the test data of the above Examples that the liquid crystal composition provided by the present invention has appropriately high optical anisotropy, higher optical anisotropy, lower threshold voltage, suitable temperature range of nematic phase, suitable elastic constant, lower viscosity, good reliability and heat stability, and good low-temperature intersolubility, and is applicable to IPS, TN-TFT liquid crystal displays.
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CN109134423B (en) | 2017-11-23 | 2020-03-17 | 江苏和成显示科技有限公司 | Compound, liquid crystal composition thereof and photoelectric display device |
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